For those of you who are adamant about using KingRoot:
Be advised.... I've used it on quite a few phones. With every update they release, they not only get closer, if not successful with achieving root, but they also get further ahead of blocking the method that uses a script to remove it before it can remove the root access. If you don't go through it thoroughly and remove it in one shot, KR moves it's files to multiple locations throughout your system folder.
The last time I used it, the script didn't work, using the same method as I've always used. I had to go in spend hours cleaning up the mess it left. It buries files and apparently it leaves backup files in case you do find them, changing permissions and blocking you. You grant KR these permissions when you allow it to be installed, so just be cautious. It's a nightmare scraping these files out of your device...
My advice would be, if the script for running the MRW folder contents fails, uninstall KingRoot immediately, and try reinstalling it, run script again. It picked up on me trying to run that script three times, and then kindly warned me that it had relocated itself in my system.
Take it, dismiss it, but you're also potentially opening up a guided map to your personal information and BRICKING. I would also strongly advise running king(o)root with a freshly wiped system and not signed in.
Oh and final EDIT:
If KingRoot fails, power cycle your phone. Some instances, doing so will allow it to reach the same fail (70% etc) instead of reaching only 10% next attempt.... Don't think it really does anything, just wanted to point it out. Good luck....
~spec